Heck, that old saw about "prevent defenses" goes way back. I think I heard in on "Monday Night Football" back when it was Dandy Don, Howard & Frank Gifford. Possibly it was CBS Football coverage with Summerall & Madden. Either way, it was a LOOOONG time ago.
I remember Dandy Don complaining about 'prevent defenses' and he was right then and it is right now. You go on the offense to win not sit back! I always get mad when I see a team I support go to prevent defense and watch the other team drive down the field.